Updating plugins.qmltypes

The prototypes for ApplicationWindow were broken.
Currently we have to duplicate the declaration of QQuickWindow.

Change-Id: I5e5aa37a4c08420fca76d94aa90cce035f7007ba
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
Fix: Button does not toggle on keypress

This ensures that you can toggle a button using the space bar.

task-number: QTBUG-33540
Change-Id: I7f665623fe113be11ba7e3f2c605e255d45e31a9
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>